Operating Position; Preparing The Boiler; Boring The Boiler Plate; Blast Tube Length - Riello RS 25/M BLU Installation, Use And Maintenance Instructions

5.4

Operating position

 The burner is designed to operate only in
positions 1, 2, 3 and 4 (Fig. 9).
 Installation 1 is preferable, as it is the only
one that allows the maintenance operations
ATTENTION
as described in this manual.
 Installations 2, 3 and 4 allow operation but
make maintenance and inspection of the
combustion head more difficult.
D3928
5.5

Preparing the boiler

5.5.1

Boring the boiler plate

Pierce the closing plate of the combustion chamber, as in Fig. 10.
The position of the threaded holes can be marked using the
thermal insulation screen supplied with the burner.
mm
RS 25-35/M BLU
5.5.2

Blast tube length

The length of the blast tube must be selected according to the
indications provided by the manufacturer of the boiler, and in any
case it must be greater than the thickness of the boiler door
complete with its fettling.
The range of available lengths L, is as follows:
Blast tube
RS 25-35/M BLU
For boilers with front flue passes 13)(Fig. 11), a protection in
refractory material 11) must be inserted between the boiler
refractory 12) and the blast tube 10).
This protection must not compromise the extraction of the blast
tube.
For boilers with a water-cooled front piece, a refractory lining 11)-
12)(Fig. 11) is not necessary, unless expressly requested by the
boiler manufacturer.
20168415
1 2
D455
A B
160 224
Short (mm) Long (mm)
230 365
Installation
 Any other position could compromise the
 The installation 5 is prohibited for safety
DANGER
3 4
5.5.3

Securing the burner to the boiler

Before securing the burner to the boiler, check (through the
opening of the blast tube) that the probe and electrode are
correctly positioned, as in Fig. 13.
Provide an adequate lifting system.
 Separate the combustion head from the rest of the burner
(Fig. 11):
 disengage the articulated coupling 4) from the graduated
sector 5);
 remove screws 2) from the two slide bars 3);
 remove screw 1) and pull the burner back on slide bars 5) by
about 100 mm.
Fig. 10
Disconnect the probe and electrode cables, then completely
C
unthread the burner from the slide bars.
M 8
Fix the unit 9)(Fig. 11) to the boiler plate, inserting the supplied
insulating gasket 6)(Fig. 11).
Use the 4 screws, also supplied, after protecting their thread with
an anti-locking product.
18 GB
correct operation of the appliance.
reasons.
5
Fig. 9
D3834
Fig. 11